How to Invoice as a Locksmith in Michigan

How to invoice as a locksmith in Michigan: MI sales tax 6.00% (services usually exempt), late fees capped at 1.5%/mo under Mich. Comp. Laws §438.31, written contracts required over $600. Step-by-step guide with a free template.

State sales tax
6%
Late fee cap
1.5%/mo
Net terms
0 days
Deposit
0%
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1. Michigan-specific invoice requirements

  • Sales tax line: 6.00% state rate. Most services rendered in Michigan are exempt from sales tax — but materials, parts, and tangible goods are not. State 6%; uniform statewide. No local sales tax.
  • Late-fee cap: Michigan statute Mich. Comp. Laws §438.31 caps interest on unpaid invoices at 1.5% per month. Spell out the rate in writing on every invoice and in your contract — courts won't enforce undisclosed fees.
  • Written contract required: Michigan requires a signed agreement for any job over $600. Reference the contract number on the invoice.
  • Right-to-cancel notice: Customers in Michigan get 72-hour cancellation rights on certain home-services contracts. Disclose this in your terms.

2. Locksmith line items + standard terms

Every locksmith invoice in Michigan should itemize work clearly. Standard locksmiths use Net 0 terms with no deposit required.

  • Service call — billed by flat (~$75 default).
  • Labor — billed by hour (~$95 default).
  • Hardware — billed by itemized.
  • After-hours surcharge — billed by pct.

3. Locksmith licensing in Michigan

Licensed in 15+ states (TX, CA, NJ, etc.). FBI background check required for licensing in most.

4. Send and follow up

Send the invoice the same day work completes. Use software that records open events and offers a one-click online payment so you don't need to chase a check by mail. Michigan customers expect digital payment options today — accepting card and ACH typically reduces days-to-paid by 30–50%.

Average invoice
$240
State
MI
Net terms
0 days
Deposit
0%

Michigan metro guides

Metro-specific guides include the combined sales-tax rate and local pricing benchmarks.

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